Added alternative control modes (ELF branch)

[CreeperMario]

• You can now press the + button on the GamePad to switch into DPAD mode.
• In this DPAD mode, the GamePad's touch screen will stop responding, and a pointer will show up on screen. The user can then use the DPAD to move this pointer around on the screen, and use the A button to trigger an action.
• Pressing + again will revert to touch screen mode.
• Note that due to the way that this works, in DPAD mode, the actions of the DPAD and A buttons are overridden, so their previous actions will no longer work. However, in the case of HBL, this is not an issue.
• The same process can be performed on Wii Remote controllers, which is useful for those who want to use a Wii Remote but do not have a functioning sensor bar.
• Theoretically, users should also be able to use Classic Controllers and Wii U Pro Controllers in the same manner, however I am not in possession of these devices, and so cannot guarantee that this works.
• I added a new image file which represents the GamePad's pointer icon.

[geogolem]

Would it be possible for you to provide the necessary elf file, with this fix added to the latest HBL release? It seems PR's aren't actually being merged..

EDIT: I actually found a link to the elf here: https://github.com/dimok789/homebrew_launcher/issues/28

It seems to be working for me. Thanks